Final answer:
Denny remaining in the space after the lease expired is an example of a tenancy at will.
Step-by-step explanation:
The situation described, where Denny remains in the space without the owner's agreement after the lease has expired, is an example of a Tenancy at will. In a tenancy at will, the tenant remains on the property with the landlord's permission, but without a formal lease agreement. This type of tenancy can be terminated by either party at any time.